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  <title>ol-ext: Control bar (editing example)</title>
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  <a href="https://github.com/Viglino/ol-ext" class="icss-github-corner"><i></i></a>

  <a href="../../index.html">
    <h1>ol-ext: Control bar (editing example)</h1>
  </a>
  <div class="info">
    <i>ol.control.Bar</i> is a panel that contains other controls. You can compose toolbars with it.
    <br/>
    This example shows an editing toolbar with select, delete, draw (point, linestring and polygon) and an export button.
    <p>
      If you're looking for a more integrated control see 
      <a href='map.control.editbar.html'>ol/control/EditBar</a>.
    </p>
  </div>

  <!-- Map div -->
  <div id="map" style="width:600px; height:400px;"></div>

  <div class="options" >
    <ul>
      <li>
        Position:
        <select onchange="mainbar.setPosition(this.value)">
          <option value="top">top</option>
          <option value="top-left">top-left</option>
          <option value="left">left</option>
          <option value="bottom-left">bottom-left</option>
          <option value="bottom">bottom</option>
          <option value="bottom-right">bottom-right</option>
          <option value="right">right</option>
          <option value="top-right">top-right</option>
        </select>
      </li>
    </ul>
    Export:<br />
    <textarea id="info" style="width:25em; height:10em"></textarea>
  </div>

  <script type="text/javascript">

    //  Vector layer
    var vector = new ol.layer.Vector( { source: new ol.source.Vector() })

    // The map
    var map = new ol.Map({
      target: 'map',
      view: new ol.View({
        zoom: 14,
        center: [270701, 6247637]
      }),
      layers: [
        new ol.layer.Tile({ source: new ol.source.OSM() }),
        vector
      ]
    });

    // Main control bar
    var mainbar = new ol.control.Bar();
    map.addControl(mainbar);

    // Edit control bar 
    var editbar = new ol.control.Bar({
      toggleOne: true,	// one control active at the same time
      group:false			// group controls together
    });
    mainbar.addControl(editbar);

    // Add selection tool:
    //  1- a toggle control with a select interaction
    //  2- an option bar to delete / get information on the selected feature
    var sbar = new ol.control.Bar();
    sbar.addControl (new ol.control.Button({
      html: '<i class="fa fa-times"></i>',
      title: "Delete",
      handleClick: function() {
        var features = selectCtrl.getInteraction().getFeatures();
        if (!features.getLength()) info("Select an object first...");
        else info(features.getLength()+" object(s) deleted.");
        for (var i=0, f; f=features.item(i); i++) {
          vector.getSource().removeFeature(f);
        }
        selectCtrl.getInteraction().getFeatures().clear();
      }
    }));
    sbar.addControl (new ol.control.Button({
      html: '<i class="fa fa-info"></i>',
      title: "Show informations",
      handleClick: function() {
        switch (selectCtrl.getInteraction().getFeatures().getLength()){
          case 0: info("Select an object first...");
            break;
          case 1:
            var f = selectCtrl.getInteraction().getFeatures().item(0);
            info("Selection is a "+f.getGeometry().getType());
            break;
          default:
            info(selectCtrl.getInteraction().getFeatures().getLength()+ " objects seleted.");
            break;
        }
      }
    }));

    var selectCtrl = new ol.control.Toggle({
      html: '<i class="fa fa-hand-pointer-o"></i>',
      title: "Select",
      interaction: new ol.interaction.Select ({ hitTolerance: 2 }),
      bar: sbar,
      autoActivate:true,
      active:true
    });

    editbar.addControl ( selectCtrl);

    // Add editing tools
    var pedit = new ol.control.Toggle({
      html: '<i class="fa fa-map-marker" ></i>',
      title: 'Point',
      interaction: new ol.interaction.Draw({
        type: 'Point',
        source: vector.getSource()
      })
    });
    editbar.addControl ( pedit );

    var ledit = new ol.control.Toggle({
      html: '<i class="fa fa-share-alt" ></i>',
      title: 'LineString',
      interaction: new ol.interaction.Draw({
        type: 'LineString',
        source: vector.getSource(),
        // Count inserted points
        geometryFunction: function(coordinates, geometry) {
            if (geometry) geometry.setCoordinates(coordinates);
          else geometry = new ol.geom.LineString(coordinates);
          this.nbpts = geometry.getCoordinates().length;
          return geometry;
        }
      }),
      // Options bar associated with the control
      bar: new ol.control.Bar({
        controls:[ 
          new ol.control.TextButton({
            html: 'undo',
            title: "Delete last point",
            handleClick: function() {
              if (ledit.getInteraction().nbpts>1) ledit.getInteraction().removeLastPoint();
            }
          }),
          new ol.control.TextButton({
            html: 'Finish',
            title: "finish",
            handleClick: function() {
              // Prevent null objects on finishDrawing
              if (ledit.getInteraction().nbpts>2) ledit.getInteraction().finishDrawing();
            }
          })
        ]
      }) 
    });

    editbar.addControl ( ledit );

    var fedit = new ol.control.Toggle({
      html: '<i class="fa fa-bookmark-o fa-rotate-270" ></i>',
        title: 'Polygon',
        interaction: new ol.interaction.Draw({
          type: 'Polygon',
          source: vector.getSource(),
          // Count inserted points
          geometryFunction: function(coordinates, geometry) {
            this.nbpts = coordinates[0].length;
            if (geometry) geometry.setCoordinates([coordinates[0].concat([coordinates[0][0]])]);
            else geometry = new ol.geom.Polygon(coordinates);
            return geometry;
          }
        }),
        // Options bar ssociated with the control
        bar: new ol.control.Bar({
          controls:[ new ol.control.TextButton({
            html: 'undo',//'<i class="fa fa-mail-reply"></i>',
            title: "undo last point",
            handleClick: function() {
              if (fedit.getInteraction().nbpts>1) fedit.getInteraction().removeLastPoint();
            }
          }),
          new ol.control.TextButton({
            html: 'finish',
            title: "finish",
            handleClick: function() {
              // Prevent null objects on finishDrawing
              if (fedit.getInteraction().nbpts>3) fedit.getInteraction().finishDrawing();
            }
          })
        ]
      }) 
    });
    editbar.addControl ( fedit );

    // Add a simple push button to save features
    var save = new ol.control.Button({
      html: '<i class="fa fa-download"></i>',
      title: "Save",
      handleClick: function(e) {
        var json= new ol.format.GeoJSON().writeFeatures(vector.getSource().getFeatures());
        info(json);
      }
    });
    mainbar.addControl ( save );

    // Show info
    function info(i){
      $("#info").html(i||"");
    }
  </script>

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